Transferring Feed from Blogger to WordPress

I know there have been quite a few posts on this subject. Honestly I have gone through them and tried to use what was suggested and I still cant get mine fixed.

My domain is themakeupsnob.com. I have always had this domain even when I used blogger. I transfered my blog over to wordpress last night and everything has gone smoothly except for updating the feed.

My from feed address when I used with blogspot was https://www.themakeupsnob.com/feeds/posts/default

Last night I went into feedburner and changed the original feed to this
https://themakeupsnob.com/feed/

my feedburner address is this: https://feeds.feedburner.com/themakeupsnob

My feed is unable to be validated. I dont know how to fix it. I really dont understand what I am doing wrong. I read where others have used a plugin called feedburner feedsmith. When I upload this to plugins. It says successfully installed then gives me the message…

“The plugin does not have a valid header.”

Any help would be much appreciated… ??